[LM24] Front splitter/diffuser regulations

[gvan]

Hi all,

New to the forum. I was brought here researching Le Mans 24 regulations and finding a few inconsistencies between what I'm reading in the rules and what I'm seeing.

To give you an example, the rules on the front diffuser state that they must "be within the perimeter of the original body work". Several other parts of the regulations say that the car must also look identical from above, again referring that no aerodynamic device must exceed the perimeter of the original bodywork.

So how the heck are the BMW M3's running front splitters that stick out over 6 inches, more than 3 inches out beyond the most forward point of the bumper? Is my interpretation all wonky? What gives?

Thanks guys!

Cheers,

Greg

[Aysedasi]

No, that's a special weight dispensation to help balance the shopping in the boot.....

No idea but others more techically-minded will have comments for sure. Welcome to the forum.

[gvan]

Originally Posted by Aysedasi

No, that's a special weight dispensation to help balance the shopping in the boot.....

No idea but others more techically-minded will have comments for sure. Welcome to the forum.

So the ACO really is serious about real-world car development!

Thanks and I have a heap more of these regulation questions. I sent several requests to the ACO but no replies.

[The Badger]

Well , theres a surprise . I wouldnt expect an answer from them .

Visible exhaust emissions is another one . The rule says NONE . None in my book means none !!! Must be differant in France .

[gvan]

Little worried about this. I really need exact information as I'm trying to draft up some cost figures for a new team. It's pretty grassroots so little things like this are an annoyance. It's expensive enough to do all the car prep without having to redo it because of ambiguity. Or being at a massive performance disadvantage because it's accepted for everyone to ignore certain rules or whatever is going on here.

[Aysedasi]

Originally Posted by The Badger

Visible exhaust emissions is another one . .

What?

Beanz
Meanz
Heinz?

[The Badger]

If your get visuals from Beanz ..... stop it right now !!!

[gvan]

So what everyone's saying is it's a total crap shoot and I should put a 2 foot long front splitter and cross my fingers? Maybe painting the french flag on it will help too?

[The Badger]

Originally Posted by gvan

Maybe painting the french flag on it will help too?

Has done so before .

[arakis]

Originally Posted by gvan

Hi all,

New to the forum. I was brought here researching Le Mans 24 regulations and finding a few inconsistencies between what I'm reading in the rules and what I'm seeing.

To give you an example, the rules on the front diffuser state that they must "be within the perimeter of the original body work". Several other parts of the regulations say that the car must also look identical from above, again referring that no aerodynamic device must exceed the perimeter of the original bodywork.

So how the heck are the BMW M3's running front splitters that stick out over 6 inches, more than 3 inches out beyond the most forward point of the bumper? Is my interpretation all wonky? What gives?

Thanks guys!

Cheers,

Greg

you've missed a few threads about the BMW before, it is basicly a prototype car witch has nothing to do with the rule book, it is only alowed to race by the ACO, with total disregard to any regulations.

[gvan]

Originally Posted by arakis

you've missed a few threads about the BMW before, it is basicly a prototype car witch has nothing to do with the rule book, it is only alowed to race by the ACO, with total disregard to any regulations.

Ahhh, this explains a lot. Thanks!

[JAG]

All GTE cars are heavily modified, and very different from the roadcar.

It's like rallying, a Group N car and WRC essentially look the same, yet the former costs in the region of £100k, the latter £400k.

[PascaLM]

I'm wondering why no other team protested for this front splitter on the BMW.

[Aysedasi]

BMW had promised to share out their Clubcard points if no-one snitched on them.......

[joeb]

Originally Posted by PascaLM

I'm wondering why no other team protested for this front splitter on the BMW.

I have heard some in the corvette camp complain about this to the media, but the vettes get their share of allowances from the aco as well.

The rsr jags were amazed to see what the other cars got away with after they were interpreting the rules the way they were written.

So you might want to consult with the aco to see what allowances you can get

[The Badger]

Originally Posted by arakis

witch

[gvan]

Originally Posted by joeb

I have heard some in the corvette camp complain about this to the media, but the vettes get their share of allowances from the aco as well.

The rsr jags were amazed to see what the other cars got away with after they were interpreting the rules the way they were written.

So you might want to consult with the aco to see what allowances you can get

And I keep telling myself NOT to be sneaky with the aero design because you WILL get busted... Maybe not. Maybe I can bolt on a couple turbos and run massive ground effects on my "Flat bottom" while I'm at it.

We'll play by the book and see what the ACO says. If they shoot us down for being the only team to be 100% within specs that'll at least be comical.

[The Badger]

Originally Posted by gvan

If they shoot us down for being the only team to be 100% within specs that'll at least be comical.

Yes ..... I would be quite surprised ..... best of luck with that

The lord works in mysterious ways !!!

[gvan]

Originally Posted by The Badger

Yes ..... I would be quite surprised ..... best of luck with that

The lord works in mysterious ways !!!

Hey, we're not called "Grassroots Racing" for nothing!

[Audi Racer]

Originally Posted by arakis

you've missed a few threads about the BMW before, it is basicly a prototype car witch has nothing to do with the rule book, it is only alowed to race by the ACO, with total disregard to any regulations.

all the gt2 cars are basically prototype cars......this guy just got his BMW repo'd hence the BMW hate.

BMW built a GT2 car. the BMW M3 roadcar is not even in the same league as the ferrari 458 italia/corvette Z06/Porsche 911 road cars. the BMW is significantly heavier and parts cost has been sacrificed to provide a cheaper car. On the order or as much as half the Porsche and half a third the Ferrari.

but thats not the point of GT2. they don't just exclude cars. Good thing your not in charge of the ACO. there'd probably be no diesels and no manufacturers.

Your not the ACO. Either your wrong or the ACO is wrong.........i doubt you have any say in the ACO.

[Audi Racer]

the fact that this forum topic is entirely directed towards the Splitter of the BMW M3 shows that the creator has taken a shallow view to the GTE field.

Your point out something completely obvious(front splitter)....But there's alot more waivers and secrets amongst all the cars that we don't know about. That includes the ferrari,porsche,corvette, and BMW. The BMw splitter is the least of your worrys sir.


Sounds like someone who's trying to smudge BMW.....Plenty of people from the world of motorsports look at these threads. Gvan could be anybody.....


The ACO does not release the waivers for each car so we don;t trully now who is doing what.


Your being scared off by the splitter of a BMW M3?.................. If you aren't pushing the ACO for every little inch when you design a car you are not doing your job.

[MitchZ06]

Thanks Audi Racer, your posts crack me up everytime!

[arakis]

Originally Posted by JAG

All GTE cars are heavily modified, and very different from the roadcar.

It's like rallying, a Group N car and WRC essentially look the same, yet the former costs in the region of £100k, the latter £400k.

the porsche and ferrari are built to rule specification

[arakis]

Originally Posted by Audi Racer

the fact that this forum topic is entirely directed towards the Splitter of the BMW M3 shows that the creator has taken a shallow view to the GTE field.

Your point out something completely obvious(front splitter)....But there's alot more waivers and secrets amongst all the cars that we don't know about. That includes the ferrari,porsche,corvette, and BMW. The BMw splitter is the least of your worrys sir.


Sounds like someone who's trying to smudge BMW.....Plenty of people from the world of motorsports look at these threads. Gvan could be anybody.....


The ACO does not release the waivers for each car so we don;t trully now who is doing what.


Your being scared off by the splitter of a BMW M3?.................. If you aren't pushing the ACO for every little inch when you design a car you are not doing your job.

we do actualy know that the 997 porsche and the 430 ferrari had only minor alowences, because before 2009 FIA and the ACO had the same rulebook for the gt2 clas, and on the FIA site you could download the homologations for the ferrari and porsche with all the waivers. BMW when it came out was so iligal that the FIA didn't alow it to race in the GT2 class.

as for the 458, we only have Lieb's coment at le mans, where he says we are looking at ferrari as a benchmark for our new car since their car has the least waivers.

[Audi Racer]

Originally Posted by arakis

we do actualy know that the 997 porsche and the 430 ferrari had only minor alowences, because before 2009 FIA and the ACO had the same rulebook for the gt2 clas, and on the FIA site you could download the homologations for the ferrari and porsche with all the waivers. BMW when it came out was so iligal that the FIA didn't alow it to race in the GT2 class.

as for the 458, we only have Lieb's coment at le mans, where he says we are looking at ferrari as a benchmark for our new car since their car has the least waivers.

new car? how soon?